Double-pole switch.



(No Model.)

Patented Jan. I-, I90l. R. E. W000.

DOUBLE PULE SWITCH.

(Application filed Aug. 28, 1900.)

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ATENT ROBERT E. WOOD, OF BALTIMORE, MARYLAND.

DOUBLE-POLE SWITCH.

SPECIFIGATION forming part of Letters Patent No. 665,156, dated January 1, 1901.

Application filed August 28, 1900. fi fl NO- 23,300- (NO d T0 at whom it may concern:

Be it known that 1, ROBERT E. W001), a citizen of the United States, residing at Baltimore, State of Maryland, have invented certain new and useful Improvements in Double- Pole Switches, of which the following is a specification.

My invention relates to switches of the push-button type for making and breaking electric circuits; and its object is to provide a double-pole switchof this character which will be positive and effective in its operation and of comparatively few and simple working parts.

To this end the invention consists in certain constructions, arrangements, and combinations of parts, which I shall hereinafter fully describe and claim.

Reference is to be had to the accompanying drawings, in which Figure 1 is a face or top plan view of my improved switch. Fig. 2 is a longitudinal vertical central section thereof. Fig. 3 is a verticalv transverse section of the switch-box, taken through the center, showing the three longitudinal compartments into which said box is divided. Fig. 4 is an inverted plan view of the switch mechanism with the switchbox removed from the face-plate. Fig. 5 is a vertical longitudinal section of the switchbox, taken approximately on the line 5 5 of Fig. 1.

The switch-box A of my improved switch is preferably composed of porcelain and contains the terminals and binding-posts and incloses the switch-operating mechanism and is provided with partitions a, which divide it into three longitudinally-extending compartments 1), c, and d, insulated from one another by the said partitions. The compartments b and c are located one on each side of the middle compartment d, and all the compartments communicate with each other at the middle of the box by means of the transverse opening as. In each of said side compartments'are two binding-posts 0, provided with terminals or contact-plates f, as shown particularly in Figs. 1, 3, and 5, which are brought into and out of electrical connection by means of my improved switch-operating mechanism.

B designates a face-plate which fits upon the top of the box A, being secured thereto by screws or in any preferred manner. This face-plate is provided with two elongated slots g, whose walls fit around the partitions a of the box, and said slots form a middle web h, which'covers the middle compartment 01 of the switch-box and has two round apertures i, through which the push-buttons O O, hereinafter specifically referred to, work.

Depending from the inner face of the faceplate B at each end of the web h is a hanger provided with spaced-apart ears j, and be tween the ears of each hanger is pivoted a lever, the two levers being designated, respectively, D and E. From their pivots the said levers extend toward each other, and their free ends overlap, as shown in Figs. 2 and 4. Their free ends are, forked, as at It and k, and a transverse pin l extends across the fork of each lever,.and to said pins the shanks m of the push-buttons C C are pivoted. The fork of each lever also has another transverse pin n. A rocking bar 0 has slotted ends 19, which take around the said transverse pins 71 of the two levers, and a helical expansion-spring q is coiled around said rocking bar 0 between said transverse pins, and the ends of the spring bear against the pins, so that when one lever is pressed by its push-button inwardly the spring will snap it down as soon as the rocking bar tilts past the center, and the spring will consequently cause the other lever to snap up. One of the levers carries the two movable contact-pieces. In the present instance the fork at the free end of the lever E is wider than the fork of the other lever D and carries the two contact-pieces 4", which are insulated from the switch operating mechanism, as shown at 8. Two arms t, spaced apart, depend from the middle of the web it of the faceplate, and these arms have position between the adjacent forked and lapped ends of said levers, anda transverse stop-rod it extends across the lower ends of said two arms 25 and is alternately struck by the free ends of the respective levers as th ey are pressed inwardly, whereby to limit their movement in that direction.

In the accompanying drawings the switch is illustrated in position to complete the electric. circuit. To break the circuit, the pushbutton 0 is pressed inwardly until the rocking bar 0 tilts past its center, when the eX- pansion-spring q will immediately cause the said bar to rock, which will simultaneously snap the pressed lever down and the other lever up, so as to carry the movable contactpieces 0' quickly out of contact with the terminalsfand break the circuit.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A switch for the purpose described, comprising terminals; two levers pivoted with their free ends extending toward each other and one of which carries contact-pieces adapted to contact with said terminals; a rocking bar loosely connected with the free ends of the two levers; a spring tending to force said free ends apart whereby to rock said bar and snap the levers quickly; and a push-button for pressing each lever to compress said spring, substantially as set forth.

2. A switch for the purpose described, comprising terminals; two levers pivoted with their free ends extending toward each other and one of which carries contact-pieces adapted to contact with said terminals; a pin secured to the free end of each lever; a rocking bar engaging the pins on both levers; an expansion-spring coiled on said rocking bar and its opposite ends pressing against the said pins; and push-buttons connected with said levers, substantially as set forth.

3. A switch for the purpose described, comprising terminals; two pivoted levers pro vided with forked ends extending toward each other and one of which carries contact-pieces adapted to contact with said terminals; trans verse pins secured in the forked ends of said levers; a rocking bar provided with slotted ends taking around said pins, an expansionspring coiled around said rocking bar and pressing against the said pins; and push-buttons connected with said levers, substantially as set forth.

4. A switch for the purpose described, co mprising a switch-cox provided with terminals; a face-plate on said box provided with hangers and arms intermediate of said hangers; a lever pivoted to each hanger and provided with a forked free endthe free ends of said levers extending toward each other and one of which carries movable contact-pieces adapted to contact with said terminals; transverse pins secured in the forked ends of said 1evers; a rocking bar provided with slotted ends taking around said pins; an expansionspring coiled around said rocking bar and pressing against the said pins; push-buttons connected with the said levers; and a transverse rod, u, extending between said arms whereby to limit the movement of said levers in one direction, substantially as set forth.

5. A switch for the purpose described, comprising a boxdivided into three compartments alongside of each other; terminals in the two outer or side compartments; a plate on said box covering the middle compartment and also provided with hangers and arms intermediate of said hangers; levers pivoted to said hangers and provided with forked ends which extend toward each other and one of said forked ends carrying movable contactpieces adapted to contact with said terminals; transverse pins secured in the forked ends of said levers; a rocking bar provided with slotted ends taking around said pins; an expansion-spring coiled around said rocking bar and pressing against the said pins; a pushbutton connected with each of said levers; and a transverse rod extending across the lower ends of said arms whereby to limit the movement of said levers in one direction, substantially as set forth.

In testimony whereof I affix my signature in the presence of two witnesses.

ROBERT E. WOOD.

Witnesses:

CHARLES E. MANN, Jr. CHARLES L. VIETSCI-I. 

